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Fermi surface reconstruction and multiple quantum phase transitions in the antiferromagnet CeRhIn5.

Authors :
Lin Jiao
Ye Chen
Yoshimitsu Kohama
Graf, David
Bauer, E. D.
Singleton, John
Jian-Xin Zhu
Zongfa Weng
Guiming Pang
Tian Shang
Jinglei Zhang
Han-Oh Lee
Park, Tuson
Jaime, Marcelo
Thompson, J. D.
Steglich, Frank
Qimiao Si
Yuan, H. Q.
Source :
Proceedings of the National Academy of Sciences of the United States of America. 1/20/2015, Vol. 112 Issue 3, p673-678. 6p.
Publication Year :
2015

Abstract

Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of the specific microscopic details of a material. However, many current studies focus on materials that exhibit quantum-driven continuous phase transitions (quantum critical points, or QCPs) at absolute zero temperature. The classification of such QCPs and the question of whether they show universal behavior remain open issues. Here we report measurements of heat capacity and de Haas-van Alphen (dHvA) oscillations at low temperatures across a field-induced antiferromagnetic QCP (Bc0 ≈ 50 T) in the heavy-fermion metal CeRhIn5. A sharp, magnetic-field-induced change in Fermi surface is detected both in the dHvA effect and Hall resistivity at B*0 ≈ 30 T, well inside the antiferromagnetic phase. Comparisons with band-structure calculations and properties of isostructural CeCoIn5 suggest that the Fermi-surface change at B*0 is associated with a localized-to-itinerant transition of the Ce-4f electrons in CeRhIn5. Taken in conjunction with pressure experiments, our results demonstrate that at least two distinct classes of QCP are observable in CeRhIn5, a significant step toward the derivation of a universal phase diagram for QCPs. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00278424
Volume :
112
Issue :
3
Database :
Academic Search Index
Journal :
Proceedings of the National Academy of Sciences of the United States of America
Publication Type :
Academic Journal
Accession number :
103328411
Full Text :
https://doi.org/10.1073/pnas.1413932112